I don't know how to measure the strength of a silinylon tarp, but I'm pretty sure standard tarp cord isn't that strong b/c I've broken some in windy conditions. Spectra, Air Core Pro, even 550 cord...none of these are on my tarps b/c they're designed to be very strong. These may be ok on the ridgeline if you don't put it on the guylines, though.
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